xfinverse(1)                General Commands Manual               xfinverse(1)



NAME
       xfinverse - forms the inverse of a list of transformations

SYNOPSIS
       xfinverse  [options]  input_file  output_file

DESCRIPTION
       Xfinverse will take the inverse of each transformation in a file.  The
       only option is whether to set the translations to zero or retain them
       in the output.  The latter would give the true inverse, but the former
       has been useful in arcane realignment procedures.

       The transform file can consist of warping transformations instead of
       simple linear transforms.  The warping transforms can consist either of
       displacements at sets of control points or displacements on a regular
       grid.  The output file has the same form as the input file.

OPTIONS
       Xfinverse uses the PIP package for input (see the manual page for
       pip). Thus, the following options can be specified either as command
       line arguments (with the -) or one per line in a command file (without
       the -):

       -input OR -InputFile File name
              File with transforms to be inverted.  If this option is not
              entered, the first non-option argument will be used for this
              input file.

       -output OR -OutputFile File name
              Output file for inverse transforms.  If this option is not
              entered, the second non-option argument will be used for the
              output file.

       -zero OR -ZeroShifts
              Set shifts to zero when taking inverse of linear transforms.

       -help OR -usage
              Print help output

       If no command line arguments are entered, the program takes the follow-
       ing inputs sequentially:

       Input file with list of transformations

       Output file for inverse transformations

       0 to set the translations (shifts) to zero, or one to retain them and
       output the true inverse transformation

HISTORY
       Written by David Mastronarde, added to IMOD 4/21/00
       Warping added, June 2011

BUGS
       Email bug reports to mast at colorado dot edu.



IMOD                                 5.0.2                        xfinverse(1)